Lens-focusing mechanism



Y' E. BAUSCH ET AL 1,711,768

LENS FOCUSING MECHANISM Filed Dec. 5, 1925 WWW - llllillllllilllllllil W\\\\\NWW\W 1 INVENTORS 10 A/ZZZL'IMLLLPISOH/ iiaJ'ATTORN y Patented May 7, 1929.

nits STATES v EDWARD BAUSCE-I AND WILLIAM L. PATTERSON, OF ROCHESTER, NEW YURI-I i, A53-v PATENT- orrics.

' SIG-KORE, TO BAUSGET. z BOMB OPTICAL GOIJIPANY, OF ROCHESTER, NEW YORK, A

CORPORATION OF NEW YORK.

nnns-roousme MECHANISM.

Application filed December 3, 1925. Serial No. 72,914.

The present invention relates to a lens focusing mechanism and has for its object to provide more particularly an improved device for supporting and adjusting a magnifying lens or reading glass whereby the same may be kept at hand, as on a table or desk and conveniently focused when needed for reading fine print, or for examining various objects not clearly distinguishable with the naked eye. r

A further object of the invention is to provide an adj ustable support or holder for a magnifying or other type of lens which is simple in construction, convenient to handle, comparatively inexpensive to manufacture and efficient in operation. To these and other ends the invention resides in certain improvements and combinations of parts, all as will-be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification;

In the drawings Figure 1 is a side elevational view illustrating one embodiment of the invention;

Figure 2 is a top plan view of the same;

Figure 3 is a view similar to Figure 1 showing the lens adjusted to a different height;

Figure 4 is an enlarged fragmentary sectional elevation taken on line 4*-4*" of Figure 2, and

Figure 5 is a fragmentary part-sectional elevation illustrating from a different angle the parts shown in Figure 4.

Similar reference numerals throughout the several views indicate the same parts.

Referring to the drawings, represents a base, which may be of any suitable design and which is preferably provided with an integral upstanding post or standard '11,

forming with the base a suitable support upon which to mount the lens holding and adjusting parts. The post 11 is preferably cut away at one side for a portion of its length as indicated at 12 and is recessed at 13 to receive the lower end of a thumb screw 14 threaded through the top port-ion 15 of the post, as indicated in Figure 4. Projecting laterally from one side of the post is a lug or extension 16 upon which is pivoted at 17 and 18, respectively, a pair of upper and lower parallel arms or links. The up-' per arm preferably comprises the spaced bars or rods 19 and 19,while the lower arm comprises the spaced bars 20 and 20 The arms at their outer ends are connected by alink 21through the upper and lower pivotsi22 and 23, respectively, the link being disposed between the rods of each arm whereby they are properly spaced and supported substantially in parallel relation. The link 21 is provided intermediate its ends with an outwardly extending stud or pin 24 which is preferably. threaded to receive the stem 25 of a lens holder or mount 26 in which is suits ably secured a lens 27, preferably one of the magnifying type such as employed in read ing glasses. However, it will be understood that any lens or combination of lenses suitable for microscopic work may be connected -with the link and supported thereby in a horizontal position if desired, depending upon the character ofthe work to bee):- amined. I

The bar 20 of the lower arm is extended, as indicated at 28, into the path of the adjusting screw 14 as shown in Figures 4and V wa 5, whereby said lower arm constitutes a lever adapted to be actuated in one direction by the thumb screw 14 and in the opposite direction by 'a spring 29, preferably disposed in a recess 30 of the base and projecting into a hollow plunger 31 which extends upwardly into the recess 13 of the post and engages the extended portion 28 ofthe lower arm as shown in Figure 4. In order to effect raising of the arms and the lens carried thereby the thumb screw is operated downwardly by turning it to the right and if it is desired to lower the lens this is done through the action of the spring upon turning the screw to the left or unscrewing it the desired amount. the lens can be quickly and coveniently brought to the proper focus over the object to be examined or the work to be inspected.

As a means for limiting the downward swinging movement of the arms, we provide a suitable stop 32 on the lug 16 preferably in the path of tl extended portion 28 of the lower arm as shown in Figure 4.

The post and parts projecting therein are preferably enclosed by a cylindrical casing 33 closely fitting the annular projecting por- Thus, it will be seen that tion 34 of the base and if desired suitably I casing 38 is slotted at to receive the lug 16 of the post and also the inwardly extended arm portion 28 which is free to move up and down in the slot.

We claim as our invention:

1. In a lens focusing mechanism, a support, a pair of parallel arms pivotally mounted upon the support one above the other, one of which has a portion extended inwardly of its pivotal point and transversely of the support, a link connecting the outer ends of the arms, a lens mount carried by the link, and a member adjustable vertically within the support adapted to engage said extended portion to effect vertical movement of the arms and means yieldably urging said extended arm portion in engagement with the adjustable member.

2. In a lens focusing mechanism, a support, a pair of arms pivotally mounted thereon, one of which is provided with an extension, a link connecting the outer ends of the arms, a lens mount carried by the link, an adjusting screw threaded upon the support to engage the extension whereby to effect vertical movement of the arms in one direction, and means acting to yieldingly urge the arms in the opposite direction.

3. In a lens focusing mechanism, a base.

having a recess therein, a pair of parallel arms pivotally mounted upon the base, one of which is provided with an extended por tion, a link connecting the outer ends ofthe arms, a lens mount carried by the link, a screw threaded upon the base and engaging said extended arm portion on one side thereof, and a spring within the recess of the base on the opposite side of the arm from the screw adapted to urge the extended arm portion in engagement with the screw.

4. In a lens focusing mechanism, a base including an upstanding member having a laterally projecting portion thereon, a screw threaded into said member, a pair of parallel arms pivotally mounted one above another upon said projecting portion, one of the arms being extended to engage the free end or the screw, a spring'projecting upwardly within the base and adapted to yieldingly maintain said projecting arm portion in engagement with the screw, a link connecting'the outer ends of the arms, and a lens mount carried by the link.

5. In a lens focusing mechanism, a supportincluding a base and a recessed member projecting upwardly therefrom and having a laterally extending lug thereon, a screw threaded vertically in the upper" end of said member, upper and lower arms pivoted upon the lug one of which is extended to form an operating portion adapted to engage the lower end of the screw, a link connecting the outer ends of the arms, a lens holder carried by the link, and a spring disposed within the base beneath the screw and operatively associated with said extended arm portion to ellect lowering of the arms upon adjustment of the screw in one direction.

6. In alens focusing mechanism, a support including a base and a recessed member projecting upwardly therefrom and having a laterally extending lug thereon, a screw threaded vertically in the upper end of said member, upper and lower arms pivotedupon the lug one of which is extended to form an operating portion adapted to engage the lower end of the screw, a link connecting the outer ends of the arms, a lens holder carried by the link, a spring disposed within the base beneath the screw and operatively associated with said extended arm portion to eflect lowering of the arms upon adjustment of the screw in one direction, a stop upon the support for limiting the movement of the arms in one direction, and a casing enclosing the upwardly projecting recessed member and having a slot for the reception of said lug and the extended portion of the arm.

EDWARD BAUSCH. WILLIAM L. PATTERSON. I 

